September 25, 2013
Mohenjo
Science
Afar Rift, amazon, business, Business News, climate, cubic kilometers, Daily Discovery, Earth, Earth Science, Environment, Ethiopia, Geology, Hotels, huffingtonpost, lava bubbles, Magma, Magma Blob, Magma Ethiopia, research, Science, Science News, Slideshow, technology, Technology News, travel, Underground Magma, University of Edinburgh, vacation, volcanic ridges
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The Afar Rift in Ethiopia is marked by enormous gashes that signal the breakup of the African continent and the beginnings of a new ocean basin, scientists think.
The fractures appear eerily similar to seafloor spreading centers, the volcanic ridges that mark the boundaries between two pieces of oceanic crust. Along the ridges, lava bubbles up and new crust is created, slowly widening the ocean basin.
But a look deep beneath the Afar Rift reveals the birth announcements may be premature. “It’s not as close to fully formed seafloor spreading as we thought,” said Kathy Whaler, a geophysicist at the University of Edinburgh in Scotland.
Whaler and her colleagues have spotted 120 cubic miles (500 cubic kilometers) of magma sitting in the mantle under the Afar Rift. Hot liquids like magma like to rise, so the discovery is a conundrum.
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Erta Ale, active volcano in the Afar Region of northeastern Ethiopia, at dawn. | Getty
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June 30, 2013
Mohenjo
Science
business, dr alexander, Earth, Earth Science, electron microscopy, Environment, Geology, huffingtonpost, iron meteorite, Meteorite Minnesota, Meteorites, minneapolis star tribune, Minnesota Meteorite, Minnesota Space Rock, pound rock, research, Science, Science News, sibley county, Slideshow, Space, Space Rock, Space Rocks, technology, Technology News, travel, vacation, Video
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Farmers expect to reap what they sow. So it was quite a surprise when Bruce Lilienthal found a meteorite half-buried in a field on his farm in Minnesota’s Sibley County, the Minneapolis Star Tribune reported.
“We didn’t know what it was at first,” Lilienthal said of the flat, oddly heavy rock in an interview with KEYC-TV.
“We’ve done enough tests to be sure it’s a meteorite,” Dr. Calvin Alexander, a meteorite expert and professor of earth sciences at the University of Minnesota, told the Star Tribune. “It is not part of the Earth. It fell out of the sky.”
Dr. Alexander told The Huffington Post in an email that he examined the 33-pound rock at his office in Minneapolis on May 30, after Lilienthal and his wife brought it in. A variety of tests — including chemical analysis and electron microscopy — convinced him that what he calls the “Lilienthal object” is an iron meteorite.
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http://www.huffingtonpost.com/2013/06/25/minnesota-meteorite-farmer-bruce-lilienthal-space-rock-video_n_3492041.html?ref=topbar
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